How to cost a mineral wool panel wall, including fixings and installation

Specify the colour and coating of both sides, the lengths and the cover module. A quote based solely on total area does not allow the cutting layout to be well estimated. Short sections above gates and long façade panels can affect production preparation, packaging and installation organisation differently.

The façade area after deducting openings does not always correspond to the quantity of panels needed to execute it. The cutting layout is determined by the division into modules, the position of gates and the way cut-off fragments are used. Not every offcut can be transferred to another location without an additional joint.

Assume the project requires 252 m² of closed wall, while the item list gives 268 m² of purchase. The difference is 16 m². It is necessary to know where it comes from before it is accepted as a reserve. In a new project, a minor change in window position can sometimes allow better use of the panel module.

In two quotes the cover width may differ, even though the price per square metre looks similar. This changes the number of pieces and the position of joints relative to openings. One layout may leave narrow cuts at the gate, another may allow the field to be closed with fuller elements. This cannot be assessed on the basis of the area total alone.

Prepare a simple layout drawing for both modules and compare the purchased quantity, supports and flashings. If the joinery design is still flexible, a minor adjustment to its position can be agreed. Such an adaptation is sometimes a rational source of savings, provided the interior function, opening light and structural requirements are maintained.

At an assumed €42.59/m² before VAT, 268 m² of panels cost €11414.12. Allow €1249.83 for flashings, €574.00 for fixings and seals, and €439.75 for transport. These items total €13677.70 excluding VAT.

The amounts are adopted assumptions, not a market price list. In a real quote, the unit of each item must be established: square metre, linear metre, piece or service. Comparing a rate per linear metre of wide flashing with a rate per square metre of developed sheet metal can lead to an incorrect result.

Adding €2624.64 for installation and €624.91 for equipment brings the total to €16927.25 excluding VAT. Across the 252 m² of finished wall this is about €67.17/m². The main structure, windows, doors and items outside the calculation are excluded.

The cost of execution depends on height, number of openings, access and weight of the pieces. A long board can reduce the number of joints but require different lifting equipment. The contractor should know the construction plan, including storage locations and the sequence of closing walls.

Offer A may include reveal flashings and plinth sealing, while offer B shows only the main panels and their screwing. For a fair comparison, the missing scopes must be added and it must be established who will perform them. A low unit price without limits of responsibility is of little use.

Also state whether the price includes cuts, edge protection, removal of swarf and preparation of installation penetrations. The number of openings may change during trade coordination. It is worth establishing how such changes are priced before the crew begins installation.

At the design stage, compare the cost of a variant with greater thickness, a different division or a different coating. Changing the panel may entail adjusting fixings, flashings and reveals, so it is not enough to add the price difference of the board alone. Some costs depend on the piece and some on the area.

In offers, also check net and gross, delivery conditions, validity period and the method of settling quantities. Show the reserve for undetermined works separately from the ordered scope. This keeps the budget clear and allows a conscious decision on which assumption should be closed before construction begins.